The region of the Salento is called "Terra d'Otranto" because this city has for centuries been the cultural and commercial heart of the region. Otranto is sited between the Adriatic and the Idrio valley, and has, throughout its history, been conquered many times. The old city, protected by city walls, is characterized by brightly colored houses, whilst the modern town, between the Minerva hills and Mount Carlo Magno, looks over the Otranto Canal, between Capo d'Otranto and Capo Linguetta. The mild climate and great artistic heritage of the city make it a magnate for tourists. The town has long established fishing industry. Agricultural production of cereals, forage crops and vegetables, and cattle farming are important to the town's economy. The local textile industry is also significant. To visit: the Cathedral, Casa Arcella, the Byzantine Church of St Pietro, the Church of St Maria dei Martiri, the Aragon Castle, the Borgo Antico, the Harbor, the Coast to the North of Otranto and the Alimini Lakes, the Badisco Port and the Grotta del Cervo.